NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ATTRIBUTES | SEE ALSO | STANDARDS
#include <math.h>double atan(double x);
The atan function computes the principal value of the arc tangent of x. For a discussion of errors due to rounding off, see math(3M).
The atan function returns the arc tangent in radians.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE | ATTRIBUTE VALUE |
---|---|
Interface Stability | Evolving |
The atan function conforms to ANSI-C.
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ATTRIBUTES | SEE ALSO | STANDARDS